FEBD seamless bridge deck connecting plate, cross-seam bridge deck structure and construction method

Abstract

This invention discloses a FEBD seamless bridge deck connection plate and a cross-joint bridge deck structure and construction method, comprising several UHPC blocks arranged sequentially along the longitudinal direction of the bridge, T-shaped expansion joints between adjacent UHPC blocks, and compressible elastic material filling the T-shaped expansion joints. The invention is characterized by further comprising: steel formwork, tension cables, insulating hoses, and series springs. This invention not only automatically adapts to the expansion and contraction deformation of the bridge caused by temperature changes, but also resists or eliminates uneven stress concentration along the transverse direction of the T-shaped expansion joints, and improves the overall rotational and flexural deformation performance of the beam ends. Furthermore, when the compressible elastic material loses its elasticity and undergoes permanent compression deformation after prolonged use, causing it to detach from the steel formwork within the T-shaped expansion joint, the tension cables can be used to bring the series-connected UHPC blocks together, thereby reducing the width of the T-shaped expansion joint and allowing the compressible elastic material to re-fit and contact the steel formwork.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, and specifically discloses a FEBD seamless bridge deck connection plate, a cross-joint bridge deck structure, and a construction method. Background Technology

[0002] In bridge construction, to accommodate the expansion and contraction caused by factors such as temperature changes, concrete shrinkage, and load, expansion joints are typically installed between the bridge superstructure and between the bridge and the roadbed. These expansion joint devices aim to regulate deformation, reduce stress concentration, extend bridge lifespan, and improve driving comfort. However, traditional expansion joints commonly suffer from problems such as steel beam breakage, clogged gaps, rubber breakage, aging, detachment, or jumping out, and cracking and breakage of the concrete in the anchorage zone. These issues significantly impact the bridge's service life and drastically increase maintenance workload and costs.

[0003] In order to reduce the use of bridge expansion joints, make the bridge deck as continuous and seamless as possible, and reduce the maintenance or repair costs of bridges, existing technologies include: Chinese invention patent (application number 202311430203.X) discloses a semi-continuous UHPC bridge deck connecting plate with side-stiffened steel plates and its construction method. The plate includes a semi-continuous UHPC connecting plate body, threaded rods anchored to and passing through the semi-continuous UHPC connecting plate body, and stiffening plates fixed to both sides of the semi-continuous UHPC connecting plate body via the threaded rods. The key feature is that an adhesive-free waterproof layer is provided below the semi-continuous UHPC connecting plate body, and several T-shaped saw cuts are made on the semi-continuous UHPC connecting plate body. The T-ribs in the T-shaped saw cuts are expansion joints filled with lightweight compressible elastic material; the T-wings in the T-shaped saw cuts are crack-resistant layers filled with polyurethane elastomer. This semi-continuous UHPC bridge deck connecting plate with side-stiffened steel plates, combined with the bridge deck UHPC connecting plate and seamless T-shaped saw cuts, presents a continuous and seamless bridge deck, adapting to the expansion and contraction caused by environmental temperature while ensuring a continuous and seamless bridge deck and driving comfort.

[0004] Chinese invention patent (application number 202411667151.2) discloses a seamless FEBD bridge deck connection plate and its construction method using T-shaped shear studs. The plate includes a semi-continuous UHPC bridge deck connection plate spanning the expansion joint at the beam end. A polyurethane pavement layer for bearing vehicle loads is laid on the upper side of the semi-continuous UHPC bridge deck connection plate. T-shaped shear studs are positioned between the polyurethane pavement layer and the semi-continuous UHPC bridge deck connection plate. This connection plate not only achieves a seamless bridge deck, significantly reducing pavement layer separation and edge curling caused by large deformation differences when wheels pass over expansion joints, but also better adapts to the complex spatial stress state of the bridge deck, meets the normal usage requirements of continuous bridge deck structures, effectively shortens the construction period, and minimizes traffic impact.

[0005] However, in engineering practice, the above-mentioned patented technical solutions still have shortcomings, mainly manifested in the following ways: (1) Although the compressible elastic material filled in the T-shaped expansion joint can absorb the horizontal expansion and contraction deformation of the main beam, the compressible elastic material will lose its elasticity and undergo permanent compression deformation after long-term use, which will cause the compressible elastic material to fall out in the T-shaped expansion joint. Furthermore, the deformed compressible elastic material will reflect back to the bridge deck pavement layer, causing the bridge deck pavement layer to crack.

[0006] (2) Under the action of vehicle load, the upper pavement layer will detach from the lower semi-continuous UHPC bridge deck connecting plate, resulting in damage to the pavement layer.

[0007] (3) The UHPC blocks are connected by corrugated steel bars, which makes the overall rotation and flexural deformation performance of the semi-continuous UHPC bridge deck connecting plate insufficient for the beam ends. The corrugated steel bars run through the UHPC blocks and the T-shaped expansion joints. Under the restriction of the corrugated steel bars, the conventional T-shaped molds cannot be installed and disassembled smoothly. Summary of the Invention

[0008] This invention provides a FEBD seamless bridge deck connection plate and a cross-joint bridge deck structure and construction method to solve one or more of the problems mentioned in the background art.

[0009] The present invention is achieved through the following technical solution.

[0010] In a first aspect, the present invention provides a FEBD seamless bridge deck connection plate, comprising a plurality of UHPC blocks arranged sequentially along the longitudinal direction of the bridge, a T-shaped expansion joint disposed between adjacent UHPC blocks, and a compressible elastic material filled in the T-shaped expansion joint, characterized in that it further comprises: The steel formwork is symmetrically arranged at the junction of the T-shaped expansion joint and the two sides of the UHPC block. Several spring tubes and several cable holes are provided through the vertical ribs of the steel formwork. A cable conduit is installed longitudinally through the UHPC block and one end is connected to a cable hole. The traction cable passes through each cable-passing pipe and cable-passing hole along the longitudinal direction of the bridge and penetrates the FEBD seamless bridge deck connecting plate. One end of the traction cable exposed on the FEBD seamless bridge deck connecting plate is connected to a locking mechanism, and the other end is fixedly connected to a limiting plate. An isolation hose, wherein the isolation hose is connected between the spring tubes on both sides of the steel template of the T-shaped expansion joint; and, A series spring is connected, which passes through the isolation hose, with the spring tube and both ends pre-embedded in the UHPC blocks on both sides.

[0011] Preferably, a steel mesh is pre-embedded in the UHPC block, and the two ends of the series spring are connected to the steel mesh.

[0012] Preferably, the compressible elastic material is one of rubber, silicone, or polyurethane elastomer.

[0013] Preferably, it also includes a rake-shaped reinforcement, which includes a rake rod arranged across the top of the T-shaped expansion joint along the longitudinal direction of the bridge, and rake teeth connected to the rake rod and embedded in the UHPC block and the compressible elastic material.

[0014] Preferably, the connection between the horizontal wing plate and the vertical wing plate of the steel template, as well as the connection between the horizontal wing plate and the vertical rib plate, has an arc-shaped chamfered structure.

[0015] Preferably, the spring tube is wrapped with an isolation cover at the end opposite to the T-shaped expansion joint, and the series spring seal extends through the isolation cover into the spring tube.

[0016] In a second aspect, the present invention provides a cross-joint bridge deck structure, including a bridge deck panel laid on a beam, characterized in that it further includes the FEBD seamless bridge deck connecting plate described in the first aspect, wherein the FEBD seamless bridge deck connecting plate is laid on the beam across the expansion joint at the beam end and abuts against the end faces of the bridge deck panels adjacent to both sides.

[0017] Preferably, a polyurethane pavement layer is laid on the bridge deck and the FEBD seamless bridge deck connecting plate, and a debonding and leveling layer is provided between the FEBD seamless bridge deck connecting plate and the beam.

[0018] Preferably, the end of the bridge deck adjacent to the FEBD seamless bridge deck connection plate is provided with an operating port for the avoidance locking mechanism, and a removable cover plate is closed on the operating port.

[0019] Thirdly, the present invention provides a construction method for a cross-joint bridge deck structure, characterized by comprising the following steps: S1. Erect the outer formwork and install the steel formwork so that the steel formwork and the outer formwork cooperate to enclose the pouring space of each UHPC block and the T-shaped expansion joint; S2. Install cable conduit, isolation hose and connecting spring; S3. Cast UHPC material within the casting space of the UHPC block; S4. Remove the outer formwork, install the traction cable, connect the locking mechanism to one end of the FEBD seamless bridge deck connecting plate exposed outside the traction cable, and fix the limiting plate to the other end. S5. Insert expansion joint control components into the T-shaped expansion joint, tension the traction cable to bring each UHPC block closer together until the T-shaped expansion joint reaches the design width, lock the tensioning end of the traction cable using the locking mechanism, pour compressible elastic material into the T-shaped expansion joint, and after the compressible elastic material solidifies, the FEBD seamless bridge deck connection plate is prefabricated. S6. Position and install the prefabricated FEBD seamless bridge deck connecting plate onto the beam at the expansion joint location, and then construct the bridge deck on both sides so that the FEBD seamless bridge deck abuts against the end face of the adjacent bridge deck on both sides, and release the locking state of the locking mechanism. S7. Apply a polyurethane pavement layer to the FEBD seamless bridge deck connection plate and bridge deck; S8. During the long-term use of the bridge, when the compressible elastic material in the T-shaped expansion joint loses contact with the steel formwork, the tension cable is re-tensioned to make the connected UHPC blocks close together, thereby reducing the width of the T-shaped expansion joint and allowing the compressible elastic material to re-fit and contact the steel formwork.

[0020] Compared with the prior art, the beneficial effects of the present invention are: 1) By setting up a permanently retained steel template, the present invention has two advantages: first, the steel template can be used as a template for casting T-shaped expansion joints and UHPC blocks, so as to play the role of template support and shaping; second, the steel template does not need to be removed after the UHPC blocks are cast, which makes construction convenient, and it can be retained as a permanent structure in the FEBD seamless bridge deck connection plate to make the expansion joints bear the force evenly.

[0021] 2) By setting a series spring through the T-shaped expansion joint to connect each UHPC block in sequence, the present invention can not only automatically adapt to the expansion and contraction deformation of the bridge caused by temperature changes, but also resist or eliminate the uneven stress concentration of the T-shaped expansion joint along the transverse direction of the bridge, and improve the overall rotation and flexural deformation performance of the beam end.

[0022] 3) By setting up a tension cable and a series spring, when the compressible elastic material loses its elasticity and undergoes permanent compression deformation after long-term use and becomes detached from the steel template in the T-shaped expansion joint, the tension cable can be used to pull the series UHPC blocks together, thereby reducing the width of the T-shaped expansion joint so that the compressible elastic material and the steel template can be re-fitted and contacted. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main structure of the FEBD seamless bridge deck connection plate of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a top view of the FEBD seamless bridge deck connection plate of the present invention. Figure 4This is a schematic diagram of the three-dimensional structure of the steel formwork; Figure 5 This is a schematic diagram of the main structure of the cross-joint bridge deck of the present invention; Figure 6 This is a schematic diagram of the main structure for installing steel formwork in the construction method of the present invention; Figure 7 This is a top view of the steel formwork installation method in the construction method of the present invention; Figure 8 This is a top view of the UHPC block after solidification and removal of the outer mold in the construction method of the present invention; Figure 9 This is a top view of the tensioning cable in the construction method of the present invention. Figure 10 for Figure 9 Sectional view at point BB; Figure 11 for Figure 10 Enlarged schematic diagram at point C (tensioning the tension cable to achieve the designed width of the T-shaped expansion joint). Figure 12 This is a top view of the FEBD seamless bridge deck connecting plate during positioning and installation in the construction method of this invention. Figure 13 for Figure 12 Sectional view at point DD; Figure 14 This is a top view of the structure after the polyurethane paving layer has been laid in the construction method of the present invention; Figure 15 This is a top view of the polyurethane pavement layer at the point where the FEBD seamless bridge deck meets the end faces of the bridge decks on both sides, as described in the construction method of this invention. The meanings of the labels in the above figures are as follows: UHPC block 1, steel mesh frame 101, T-shaped expansion joint 2, steel formwork 3, transverse wing plate 301, vertical wing plate 302, vertical rib plate 303, spring tube 4, cable hole 5, isolation hose 6, series spring 7, traction cable 8, limit plate 801, locking mechanism 802, cable tube 9, rake-shaped reinforcement 10, rake rod 1001, rake teeth 1002, bridge deck 11, beam 12, polyurethane pavement layer 13, debonding leveling layer 14, expansion joint 15, operating port 16, outer formwork 17, expansion joint control component 18, isolation cover 19, cover plate 20, compressible elastic material 21. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are merely illustrative examples of the present invention, and the scope of protection of the present invention is not limited thereto. The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0025] This embodiment provides a FEBD seamless bridge deck connection plate. Please refer to [link / reference]. Figures 1 to 4 ,include: Several UHPC blocks 1 are arranged sequentially along the longitudinal bridge direction; A T-shaped expansion joint 2 is provided between adjacent UHPC blocks 1; Compressible elastic material 21 is filled in the T-shaped expansion joint 2; The steel formwork 3 is symmetrically arranged at the junction of the T-shaped expansion joint 2 and the UHPC block 1 on both sides. Several spring tubes 4 and several cable holes 5 are provided through the vertical ribs 303 of the steel formwork 3. Cable conduit 9, which is installed longitudinally through the UHPC block 1 and has one end connected to cable hole 5. The traction cable 8 passes through each cable tube 9 and cable hole 5 along the longitudinal direction of the bridge and penetrates the FEBD seamless bridge deck connecting plate. One end of the traction cable 8 exposed on the FEBD seamless bridge deck connecting plate is connected to the locking mechanism 802, and the other end is fixedly connected to the limiting plate 801. The isolation hose 6 is connected between the spring tubes 4 on the steel templates 3 on both sides of the T-shaped expansion joint 2; and, A series spring 7 is connected, which passes through the isolation hose 6 and the spring tube 4 and is embedded at both ends in the UHPC blocks 1 on both sides. In this embodiment: The UHPC block 1 is made of UHPC, which meets the requirements of the national standard GB / T 31387-2025. The UHPC block 1 is square in shape, and its size is determined according to the construction requirements. The T-shaped expansion joint includes a T-rib and a T-wing. The T-rib is mainly used to absorb the horizontal expansion and contraction deformation of the main beam, and the T-wing, as a crack-resistant layer, is mainly used to prevent the deformation of the expansion joint from being reflected onto the seamless and continuous bridge deck pavement layer, thus avoiding the bridge deck pavement layer from cracking. The width of the T-rib is 2-3 cm, the width of the T-wing is 10-15 cm, and the height of the T-wing is the same as the width of the T-rib. The compressible elastic material 16 is made of a material with good elastic deformation properties, such as rubber, silicone, or polyurethane elastomer; in this embodiment, the compressible elastic material 21 is selected as a polyurethane elastomer. The shape of the steel template 3 matches the shape of the T-shaped expansion joint 2. The steel template 3 serves two purposes: firstly, it acts as a template for casting the T-shaped expansion joint 2 and the UHPC block 1, providing support and shaping; secondly, after the UHPC block 1 is cast, the steel template 3 is not removed and remains as a permanent structure within the FEBD seamless bridge deck connecting plate, ensuring uniform stress on the expansion joint and preventing localized detachment. The steel template 3 is fabricated from steel plates with a thickness of 2-3mm according to the design dimensions of the T-shaped expansion joint 2, and a cable-passing hole 5 with a diameter identical to the outer diameter of the cable-passing pipe 9 is pre-drilled and reserved, while a spring-passing pipe 4 is installed. The spring-passing pipe 4 is a stainless steel pipe with a length of 10-12cm and an inner diameter of 5-8cm. The tension cable 8 is made of steel strand or wire rope with the required strength. In this embodiment, the tension cable 8 is made of stranded steel strand with an outer diameter of 15.2 mm (using a standard 1×7 structure, with a central wire diameter of about 5.15 mm and the outer 6 wires having a diameter of about 5.0 mm). The locking mechanism 802 is a wedge-type anchor commonly used in steel strand tensioning construction. The cable conduit 9 is a steel pipe with a diameter of 20 mm, and its length is the same as the width of the UHPC block 1. The isolation hose 6 is a rubber hose or a retractable corrugated pipe. The isolation hose 6 is connected between the spring tubes 4 on the steel templates 3 on both sides of the T-shaped expansion joint 2 to form a channel for the series spring 7 to pass through. At the same time, it is used to isolate the compressible elastic material 21 filled in the T-shaped expansion joint 2 and prevent the compressible elastic material 21 from entering the spring tube 4. The working deformation of the series spring 7 is greater than the width of the T-rib of the T-shaped expansion joint 2, and its stiffness is 50–300 N / mm. By setting the series spring 7 through the T-shaped expansion joint 2 to connect each UHPC block 1 in series, it can not only automatically adapt to the expansion and contraction deformation of the bridge caused by temperature changes, but also resist or eliminate the uneven stress concentration of the T-shaped expansion joint 2 along the transverse direction of the bridge, and improve the overall rotation and flexural deformation performance of the beam end. Furthermore, when the compressible elastic material loses its elasticity and undergoes permanent compression deformation after long-term use and separates from the steel formwork in the T-shaped expansion joint, the series UHPC blocks 1 can still be pulled together by the tensioning cable 8, thereby reducing the width of the T-shaped expansion joint 2 and allowing the compressible elastic material to re-embed and contact the steel formwork.

[0026] In a preferred embodiment, a steel mesh 101 is pre-embedded in the UHPC block 1, and the two ends of the series spring 7 are connected to the steel mesh 101; this structure can improve the connection strength and stability between the series spring 7 and the UHPC block 1.

[0027] In a preferred embodiment, a rake-shaped reinforcement 10 is also included. The rake-shaped reinforcement 10 includes a rake bar 1001 arranged along the longitudinal direction of the bridge across the top of the T-shaped expansion joint 2, and rake teeth 1002 connected to the rake bar 1001 and embedded in the UHPC block 1 and the compressible elastic material. With this structure, when the polyurethane pavement layer 13 is laid on the FEBD seamless bridge deck connecting plate, the rake-shaped reinforcement 10 can simultaneously bond the compressible elastic material 21 and the UHPC block 1 filled in the T-wing of the lower T-shaped expansion joint 2, as well as the upper polyurethane pavement layer 13. This effectively improves the connection performance between the upper polyurethane pavement layer and the lower semi-continuous UHPC bridge deck connecting plate, and can significantly reduce the pavement layer detachment and edge curling caused by the large deformation difference when the wheels roll over the T-shaped expansion joint 2.

[0028] In a preferred embodiment, the connection between the horizontal wing plate 301 and the vertical wing plate 302 of the steel formwork 3, and the connection between the horizontal wing plate 302 and the vertical rib plate 303, are arc-shaped chamfered structures. With the above arrangement, when filling the compressible elastic material 21, the right angle of the T-shaped expansion joint can be changed to a chamfer, thereby increasing the contact area between the compressible elastic material 21 in the T-shaped expansion joint 2 and the steel formwork 3, thus preventing the compressible elastic filler from falling off, and also preventing prestress concentration.

[0029] In a preferred embodiment, the spring tube 4 is wrapped with an isolation cover 19 at one end away from the T-shaped expansion joint 2, and the series spring 7 extends into the spring tube 4 through the isolation cover 19; the isolation cover 19 is used to seal the gap between the series spring 7 and the opening of the spring tube 4 to prevent UHPC material from entering the spring tube 4 when the UHPC block 1 is poured. Example 2

[0030] This embodiment provides a cross-joint bridge deck structure; please refer to [link / reference]. Figure 5 The bridge deck 11 is laid on the beam 12, and the FEBD seamless bridge deck connecting plate described in Embodiment 1 is laid on the beam 12 across the expansion joint 15 at the beam end and abuts against the end face of the bridge deck 11 adjacent to both sides.

[0031] In a preferred embodiment, a polyurethane pavement layer 13 is laid on the bridge deck 11 and the FEBD seamless bridge deck connecting plate, and a debonding leveling layer 14 is provided between the FEBD seamless bridge deck connecting plate and the beam.

[0032] In a preferred embodiment, the end of the bridge deck 11 adjacent to the FEBD seamless bridge deck connection plate is provided with an operating port 16 for the avoidance locking mechanism 802, and a removable cover plate 20 is covered above the operating port 16; when it is necessary to tension the traction cable 8, the cover plate 20 can be opened and the traction cable 8 can be tensioned with the help of a tensioning device so that the connected UHPC blocks 1 can be pulled together to reduce the width of the T-shaped expansion joint 2. Example 3

[0033] This embodiment provides a construction method for a cross-joint bridge deck structure, including the following steps: S1, please refer to Figure 6 and Figure 7 First, the outer formwork 17 is erected. The outer formwork 17 can be a wooden formwork or steel formwork of appropriate size and specifications. Then, the steel formwork 3 is installed according to the setting position and size of the T-shaped expansion joint 2. The steel formwork 3 and the outer formwork 17 cooperate to enclose and form the pouring space of each UHPC block 1 and the T-shaped expansion joint. S2. Install cable conduit 9 in the casting space of UHPC block 1 and connect one end of cable conduit 9 to cable hole 5. Then wrap isolation cover 19 around the end of spring conduit 4 away from T-shaped expansion joint 2. Then install isolation hose 6 and series spring 7 so that the series spring 7 passes through isolation hose 6 and spring conduit 4 and is embedded at both ends in the casting area of ​​UHPC block 1 on both sides and is in a natural state. S3. Mix the UHPC material and pour it into the pouring space of UHPC block 1. After vibrating it evenly, cure it in the conventional way. S4, please refer to Figure 8 and Figure 9 After the UHPC block 1 is formed and reaches the design strength, the outer mold 17 is removed. The traction cable 8 is passed through each cable pipe 9 and cable hole 5 along the longitudinal direction of the bridge and through the FEBD seamless bridge deck connecting plate. A locking mechanism 802 is connected to one end of the traction cable 8 exposed on the FEBD seamless bridge deck connecting plate, and a limiting plate 801 is fixedly connected to the other end. S5, please refer to Figure 9 , Figure 10 and Figure 11According to the width of the T-shaped expansion joint T-rib, select a square timber or steel pipe of appropriate size as the expansion joint control component 18. Insert one end of the expansion joint control component 18 into the T-shaped expansion joint and leave the other end exposed. Use tensioning equipment to pull the tensioning end of the tensioning cable 8 to tension the cable, causing each UHPC block 1 to move closer together. Under the limitation of the expansion joint control component 18, the two steel templates 3 between adjacent UHPC blocks 1 approach each other until they contact the expansion joint control component 18 and bear force, thereby controlling the T-shaped expansion joint to achieve its desired shape. The design width is then used; the tensioning end of the traction cable 8 is locked using the locking mechanism 802 to prevent the traction cable 8 from retracting and causing the width of the T-shaped expansion joint to change. At this time, the series spring 7 is in a compressed state; then, the compressible elastic material 21 is poured into the T-shaped expansion joint. After the compressible elastic material 21 solidifies, the expansion joint control component 18 is removed, and the compressible elastic material 21 is poured into the hole formed at the insertion position of the expansion joint control component 18 for repair, thus prefabricating the FEBD seamless bridge deck connection plate. S6, please refer to Figure 12 and Figure 13 The prefabricated FEBD seamless bridge deck connecting plate is positioned and installed on the beam 12 at the expansion joint 15. Then, the bridge deck 11 on both sides is constructed so that the FEBD seamless bridge deck abuts against the end face of the bridge deck 11 adjacent to both sides. Then, the locking state of the locking mechanism 802 is released. S7, please refer to Figure 14 A polyurethane pavement layer 13 is constructed on the FEBD seamless bridge deck connection plate and bridge deck 11 using conventional methods, and a rake-shaped reinforcement 10 is installed at the T-shaped expansion joint 2. The rake-shaped reinforcement 10 can simultaneously bond the compressible elastic material 21 and UHPC block 1 filled in the T-wing of the lower T-shaped expansion joint 2, as well as the polyurethane pavement layer 13 above. S8, please refer to Figure 15 During the long-term use of the bridge, when the compressible elastic material in the T-shaped expansion joint loses its elasticity and undergoes permanent compression deformation, thus detaching from the steel formwork, the polyurethane pavement layer 13 at the contact position between the FEBD seamless bridge deck and the end faces of the adjacent bridge deck 11 is first cut and removed, exposing the joint between the FEBD seamless bridge deck and the end faces of the bridge deck 11. Then, the cover plate 17 is opened and the tensioning cable 8 is tensioned again using the tensioning equipment, so that the connected UHPC blocks 1 are pulled together, thereby reducing the width of the T-shaped expansion joint 2 and allowing the compressible elastic material to re-fit and contact the steel formwork. Afterward, the compressible elastic material is poured into the joint between the FEBD seamless bridge deck and the end faces of the bridge deck 11. After the compressible elastic material solidifies and forms, the locking mechanism 802 is released, and the polyurethane pavement layer 13 at the contact position between the FEBD seamless bridge deck and the end faces of the adjacent bridge deck 11 is repaired.

Claims

1. A FEBD seamless bridge deck connection plate, comprising a plurality of UHPC blocks arranged sequentially along the longitudinal direction of the bridge, a T-shaped expansion joint disposed between adjacent UHPC blocks, and a compressible elastic material filled within the T-shaped expansion joint, characterized in that, Also includes: The steel formwork is symmetrically arranged at the junction of the T-shaped expansion joint and the two sides of the UHPC block. Several spring tubes and several cable holes are provided through the vertical ribs of the steel formwork. A cable conduit is installed longitudinally through the UHPC block and one end is connected to a cable hole. The traction cable passes through each cable-passing pipe and cable-passing hole along the longitudinal direction of the bridge and penetrates the FEBD seamless bridge deck connecting plate. One end of the traction cable exposed on the FEBD seamless bridge deck connecting plate is connected to a locking mechanism, and the other end is fixedly connected to a limiting plate. An isolation hose, wherein the isolation hose is connected between the spring tubes on both sides of the steel template of the T-shaped expansion joint; and, A series spring is connected, which passes through the isolation hose, with the spring tube and both ends pre-embedded in the UHPC blocks on both sides.

2. The FEBD seamless bridge deck connection plate as described in claim 1, characterized in that, The UHPC block is pre-embedded with a steel mesh frame, and the two ends of the series spring are connected to the steel mesh frame.

3. The FEBD seamless bridge deck connection plate as described in claim 1, characterized in that, The compressible elastic material is one of rubber, silicone, or polyurethane elastomer.

4. The FEBD seamless bridge deck connection plate as described in claim 1, characterized in that, It also includes a rake-shaped reinforcement, which includes a rake bar that is arranged across the top of the T-shaped expansion joint along the longitudinal direction of the bridge, and rake teeth that are connected to the rake bar and embedded in the UHPC block and the compressible elastic material.

5. The FEBD seamless bridge deck connection plate as described in claim 1, characterized in that, The connection between the horizontal and vertical flanges of the steel formwork, as well as the connection between the horizontal flange and the vertical rib, has an arc-shaped chamfered structure.

6. The FEBD seamless bridge deck connection plate as described in claim 1, characterized in that, The spring tube is wrapped with an isolation cover at the end opposite to the T-shaped expansion joint, and the series spring seal extends through the isolation cover into the spring tube.

7. A cross-joint bridge deck structure, comprising a bridge deck panel laid on a beam, characterized in that, It also includes the FEBD seamless bridge deck connection plate as described in claim 1, wherein the FEBD seamless bridge deck connection plate is laid on the beam body across the expansion joint at the beam end and abuts against the end face of the bridge deck adjacent to both sides.

8. A cross-joint bridge deck structure as described in claim 7, characterized in that, The bridge deck and the FEBD seamless bridge deck connecting plate are covered with a polyurethane pavement layer, and a debonding and leveling layer is provided between the FEBD seamless bridge deck connecting plate and the beam.

9. A cross-joint bridge deck structure as described in claim 7, characterized in that, The end of the bridge deck adjacent to the FEBD seamless bridge deck connection plate is provided with an operating port for the avoidance locking mechanism, and a removable cover plate is closed on the operating port.

10. A construction method for a cross-joint bridge deck structure, characterized in that, Includes the following steps: S1. Erect the outer formwork and install the steel formwork so that the steel formwork and the outer formwork cooperate to form a T-shaped expansion joint and the pouring space for each UHPC block; S2. Install cable conduit, isolation hose and connecting spring; S3. Cast UHPC material within the casting space of the UHPC block; S4. Remove the outer formwork, install the traction cable, connect the locking mechanism to one end of the FEBD seamless bridge deck connecting plate exposed outside the traction cable, and fix the limiting plate to the other end. S5. Insert expansion joint control components into the T-shaped expansion joint, tension the traction cable to bring each UHPC block closer together until the T-shaped expansion joint reaches the design width, lock the tensioning end of the traction cable using the locking mechanism, pour compressible elastic material into the T-shaped expansion joint, and after the compressible elastic material solidifies, the FEBD seamless bridge deck connection plate is prefabricated. S6. Position and install the prefabricated FEBD seamless bridge deck connecting plate onto the beam at the expansion joint location, and then construct the bridge deck on both sides so that the FEBD seamless bridge deck abuts against the end face of the adjacent bridge deck on both sides, and release the locking state of the locking mechanism. S7. Apply a polyurethane pavement layer to the FEBD seamless bridge deck connection plate and bridge deck; S8. During the long-term use of the bridge, when the compressible elastic material in the T-shaped expansion joint loses contact with the steel formwork, the tension cable is re-tensioned to make the connected UHPC blocks close together, thereby reducing the width of the T-shaped expansion joint and allowing the compressible elastic material to re-fit and contact the steel formwork.

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